asn.dev

Autonomous system

AS57981 NCN-AS

Unclassified RIPE

IPv4 addresses 1.54K 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly UA
Exchanges 1 recorded by PCH
Upstreams 3 0 downstream
Flagged prefixes 0 none

Summary

NCN

Ukraine · AI-generated

residential isp ukraine access

The AS handle NCN-AS is held by Kachanovskiy Sergey Sergeevich.

What it's used for

  • The address space carries residential dynamic IP traffic, evidenced by reverse DNS entries such as ip-57-255.dynamic.pool.ncn.od.ua and ip-114-128.ncn.od.ua.
  • The network announces 1536 IPv4 addresses across 2 prefixes and maintains 5 observed neighbours, a ratio consistent with an access or eyeball network rather than a transit provider.
  • Traffic from this AS consists of subscriber internet access for end-users in the Odesa region of Ukraine.

Notable

  • Registrants for the two announced prefixes differ: 91.215.56.0/22 is registered to Voronenko Olena Kostyantunivna (netname ORG-VOK1-RIPE), while 91.237.114.0/23 is registered to Kachanovskiy Sergey Sergeevich (netname NCN).
  • The inventory consists of two distinct IPv4 blocks with no IPv6 prefixes announced.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
RUDAKI-IXKiev, Ukraine185.1.225.57

Transit providers

3 upstream, 0 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS43103ONE TELECOM ltd174
AS199995Omega Telecom LLC152
AS24482SG.GS2

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 2 prefixes · 1.54K addresses IPv6 0 prefixes

CountryNamePrefixes
UAUkraine2

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS57981
Registry name
NCN-AS
Registrant
NCN-UA-MNT
Abuse contact
oleg@ncn.od.ua
Registered
2012-03-23
Last changed
2025-04-07
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 5 with no ROA
ROAs
0 authorising AS57981
ASPA
no ASPA record
IRR
100% registered · 5 of 5 announcements
Route objects
8 naming AS57981

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,781 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check